KR101013205B1 - Rapid hardening and heat reflection composition using poly methyl methacrylate resin for polyurea waterproofing paint and manufacturing method and constructing method thereof - Google Patents

Abstract

PURPOSE: A quick-curable heat-insulating material composition using a polymethylmethacryl resin is provided to prevent the transfer of outside heat to the inside, and to complement physical and chemical properties. CONSTITUTION: A quick-curable heat-insulating material composition using a polymethylmethacryl resin for polyurea waterproofing paint comprises a base material part and a hardener part. The base material part includes 50~65 weight% polymethacryl resin, 5~10 weight% coloring pigment, 0.2~2 weight% dispersing agent, 0.2~2 weight% antifoaming agent, 0.2~2 weight% UV stabilizer, 5~20.5 weight% acrylic rubber, 1~5 weight% paraffin wax and 13~21 weight% hollow glass bubbles. The hardener part comprises 40~50 weight% benzoyl peroxide and 50~60 weight% dioctylphthalate.

Description

Fast curing type heat shield composition using polymethyl methacrylate resin for polyurea waterproof coating material, manufacturing method thereof and construction method thereof

The present invention relates to a fast curing type heat shield composition using a polymethyl methacrylate resin for a polyurea waterproof coating material, and to a polymethylmethacrylic resin for securing physical, mechanical and chemical properties of the polyurea after construction of the polyurea paint. It relates to a fast curing type heat insulating material composition used.

Conventional polyurea waterproofing method is very excellent in the mechanical properties of the polyurea itself, but after a certain period of time due to problems such as ultraviolet rays after construction, discoloration, lifting and peeling of the coating film frequently occurs and the bond strength with the structure is poor Problems with performance often arise.

In the industry, there have been various studies such as construction method between the structure to be painted and the polyurea coating material, treatment method of the base surface of the polyurea coated, and structural method using water-soluble base material, but elasticity including polyurea The research on the functional coating material of the top layer for the waterproof coating material is insufficient, and in particular, there is little research on the fast curing coating material having the thermally initiated thermal shielding function applicable to the fast curing polyurea coating material.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to heat the outside of the structure to solve the discoloration, lifting of the coating film and peeling of the coating film, which is a problem of the polyurea waterproof coating material. It is to secure the physical mechanical and chemical properties of the polyurea coating material by preventing the transfer to the inside.

Another object of the present invention is to provide a coating material excellent in fast curing even in a low temperature working environment during the winter by using a polymethyl methacryl resin.

Still another object of the present invention is to provide a coating material having excellent heat shielding effect due to thermal stability and low thermal conductivity using a hollow glass bubble.

The fast-curing heat shield composition using the polymethyl methacrylate resin for the polyurea waterproof coating material of the present invention is a coating material composition consisting of a main portion and a hardener portion, the main portion of the polymethyl methacryl resin 50 to 65% by weight based on 100 parts by weight of the main portion %, Coloring pigment 5-10 wt%, dispersant 0.2-2 wt%, antifoam 0.2-2 wt%, UV stabilizer 0.2-2 wt%, acrylic rubber 5-20.5 wt%, paraffin wax 1-5 wt%, hollow glass Bubble is contained in 13 to 21% by weight, the curing agent portion is composed of 40 to 50% by weight of benzoyl peroxide, 50 to 60% by weight of dioctylphthalide with respect to 100% by weight of the curing agent.

On the other hand, the method of manufacturing a fast curing heat shield composition using a polymethyl methacrylate resin for the polyurea waterproof coating material of the present invention is methyl methacrylate 30 to 40 to 100% by weight of polymethyl methacrylate resin while gradually increasing the temperature of the reaction tank 20% to 30% by weight of butyl acrylate was added to the reactor, and the temperature was maintained at 70 ° C. Then, 30-50% by weight of polymethylmethacrylic acid was slowly added, stirred at a speed of 200 rpm for 3 hours, and then at a temperature of 30 ° C. Polymethyl methacrylic resin manufacturing step to be completed by cooling, 50 to 65% by weight of the polymethyl methacryl resin, 5 to 10% by weight pigment, 0.2 to 2% by weight dispersant, 0.2 ~ defoamer based on 100% by weight of the main part 2% by weight, UV stabilizer 0.2-2%, acrylic rubber 5-20.5%, paraffin wax 1-5%, hollow glass bubble 13-21% by weight in a stirrer to homogenize evenly for 30-40 minutes The main part manufacturing step of the heat shield material composition, including the benzoyl peroxide 40 to 50% by weight, 50 to 60% by weight of dioctylphthallay with respect to 100% by weight of the hardened portion, including the step of manufacturing the hardened portion of the heat-curable heat shield composition Characterized in that made.

On the other hand, the construction method of the fast-curing heat shield composition using a polymethyl methacryl resin for the polyurea waterproof coating material of the present invention is a pretreatment step to remove the foreign matter, after the pretreatment step to apply the primer coating to promote the adhesion of the pretreated structure and the polyurea Step, the polyurea waterproof material construction step of spraying the polyurea waterproofing material on the upper surface of the structure after the bottom coating step using the impact mixing spray equipment, the fast curing type of any one of claims 1 to 4 on the upper surface of the polyurea waterproofing material It characterized in that it comprises the construction step of the heat-curable heat shield material composition for coating the heat shield using any one of the planetary roll and airless spray equipment.

The present invention is to secure the physical mechanical properties and chemical properties of the polyurea coating material by preventing heat transfer to the inside of the structure to solve the discoloration, lifting of the coating film and peeling of the coating film, which is a problem of the polyurea waterproof coating material It works.

In addition, by using a polymethyl methacryl resin in the cold working environment at the time of the winter there is an effect excellent in fast curing by the initiation reaction due to the radical formation.

In addition, there is an excellent heat shielding effect due to the thermal stability and low thermal conductivity using a hollow glass bubble.

A fast curing type heat shield composition using a polymethyl methacrylate resin for a polyurea waterproofing coating material according to the present invention, a manufacturing method thereof, and a preferred embodiment of the construction method will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. It is to be understood that the following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention of the user, the operator, or the precedent, and the meaning of each term should be interpreted based on the contents will be.

First, the heat-curable heat shield composition using the polymethyl methacrylate resin for the polyurea waterproof coating material of the present invention is a coating material composition consisting of a main portion and a hardener portion, the main portion of the polymethyl methacrylate resin 50 ~ 65 % By weight, pigmented pigment 5-10% by weight, dispersant 0.2-2% by weight, defoamer 0.2-2% by weight, UV stabilizer 0.2-2% by weight, acrylic rubber 5-20.5% by weight, paraffin wax 1-5% by weight, hollow It is contained in 13 to 21% by weight of the glass bubble, the curing agent portion is composed of 40 to 50% by weight of benzoyl peroxide, 50 to 60% by weight of dioctylphthalide with respect to 100% by weight of the curing agent.

In another embodiment of the present invention, 4 to 5 parts by weight of the hardened part is added to and mixed with 100 parts by weight of the main part, and more preferably 3 parts by weight is added.

In another embodiment of the present invention, the polymethylmethacrylic resin is 30 to 40% by weight of methyl methacrylate, 20 to 30% by weight of butyl acrylate and 30 to 50% to polymethylmethacrylic resin, based on 100% by weight of polymethylmethacrylic resin. It is preferable that weight% is included.

In another embodiment of the present invention, the viscosity of the polymethyl methacryl resin is preferably 300 to 400 cP (centipoise).

On the other hand, the method of manufacturing a fast curing heat shield composition using a polymethyl methacrylate resin for the polyurea waterproof coating material of the present invention is methyl methacrylate 30 to 40 to 100% by weight of polymethyl methacrylate resin while gradually increasing the temperature of the reaction tank 20% to 30% by weight of butyl acrylate was added to the reactor, and the temperature was maintained at 70 ° C. Then, 30-50% by weight of polymethylmethacrylic acid was slowly added, stirred at a speed of 200 rpm for 3 hours, and then at a temperature of 30 ° C. Polymethyl methacrylic resin manufacturing step to be completed by cooling, 50 to 65% by weight of the polymethyl methacryl resin, 5 to 10% by weight pigment, 0.2 to 2% by weight dispersant, 0.2 ~ defoamer based on 100% by weight of the main part 2% by weight, UV stabilizer 0.2-2%, acrylic rubber 5-20.5%, paraffin wax 1-5%, hollow glass bubble 13-21% by weight in a stirrer to homogenize evenly for 30-40 minutes The main part manufacturing step of the heat shield material composition, including the benzoyl peroxide 40 to 50% by weight, 50 to 60% by weight of dioctylphthallay with respect to 100% by weight of the hardened portion, including the step of manufacturing the hardened portion of the heat-curable heat shield composition It is done.

On the other hand, the construction method of the fast-curing heat shield composition using a polymethyl methacryl resin for the polyurea waterproof coating material of the present invention is a pretreatment step to remove the foreign matter, after the pretreatment step to apply the primer coating to promote the adhesion of the pretreated structure and the polyurea Step, the polyurea waterproof material construction step of spraying the polyurea waterproofing material on the upper surface of the structure after the bottom coating step using the impact mixing spray equipment, the fast curing type of any one of claims 1 to 4 on the upper surface of the polyurea waterproofing material It comprises a construction step of the fast-curing heat shield material composition for coating the heat shield using any one of the planetary roll and airless spray equipment.

Hereinafter, a preferred embodiment of the present invention will be described. The following description is only one example and the present invention is not limited thereto.

Polyurea resin of the polyurea coating material, which is a paint used for waterproofing the structure, is a two-component resin of 100% volume solids with fast curing properties, and should have a continuous coating film formation and excellent mechanical properties.

Table 1 shows the construction conditions of the polyurea coating material applied to the present invention.

Table 2 is the physical condition of the polyurea coating material applied to the present invention.

In order to satisfy the conditions of Tables 1 and 2, polyurea coating material requires waterproof coating material of the top layer which is excellent in UV and chemical resistance performance, and solvent evaporation finish coating material which is most used as non-yellowing coating material has such chemical resistance performance. Lack.

The coating composition of the present invention is divided into a main part and a hardener part, and the main part includes polymethyl methacrylate, a coloring pigment, a dispersant, an antifoaming agent, a UV stabilizer, an acrylic rubber, a paraffin wax, and a hollow glass bubble, and the hardener part is benzoyl peroxide, dioctyl. Phthalays are included.

The polymethylmethacrylic resin of the present invention, unlike conventional solvent evaporation type non-crosslinked acrylic resins, is used for the radical initiation reaction of peroxide that satisfies UV and chemical resistance, unlike top coat finish paints, automobile repair paints and plastic paints. By forming the crosslinking by this, it is possible to obtain a coating material excellent in heat resistance, solvent resistance and chemical resistance.

In particular, unlike conventional acrylic resins, polymethyl methacryl resin has a content of volatile organic compounds within 10% by weight using the EPA Method 24 test method (the volatile component of the monomer according to the test method), and a volume solid content of 100%. There is an advantage in that a thick coating film is formed by a single coating near.

When explaining a fast curing type heat shield composition using a polymethyl methacryl resin for a polyurea waterproofing coating material according to the present invention, a manufacturing method thereof and its construction method in detail as follows.

First, the main material in the polyurea waterproof coating composition according to the present invention, the manufacturing process of the fast curing type polymethyl methacryl resin is as follows.

While gradually raising the temperature of the reactor, 30-40% by weight of methylmethacrylate having a purity of 99.8% and 20-30% by weight of butyl acrylate having a purity of 99.8% based on 100% by weight of polymethylmethacrylic resin were added. Keep the temperature up to 70 ℃.

Slowly inject the mixture to 30-50% by weight of polymethylmethacryl having a number average molecular weight of 110,000 by addition polymerization of methyl methacryl, and maintain the stirring speed at 200 rpm for 3 hours, and then cool it to a temperature of 30 ° C. or lower to polymethyl methacryl. Complete the preparation of the resin.

The polymethylmethacrylic resin produced by the above method exhibits a property of 300 to 400 cP (centipoise) viscosity.

Polymethyl methacryl used in the present invention is IH830B of LG MMA, and the glass transition temperature is preferably 114 ℃.

As a subject of the present invention, the polymethylmethacrylic resin is subjected to a mixing process including a UV stabilizer, a dispersant, an antifoaming agent, an acrylic rubber, a paraffin wax, and a hollow glass bubble.

That is, 50 to 65% by weight of polymethyl methacryl resin, 5 to 10% by weight of coloring pigment, 0.2 to 2% by weight of dispersant, 0.2 to 2% by weight of antifoaming agent, 0.2 to 2% by weight of UV stabilizer, 5 to 20.5% by weight of acrylic rubber , 1 to 5% by weight of paraffin wax, 13 to 21% by weight of hollow glass bubble was mixed to homogenize 30 to 40 minutes in a stirrer to prepare the main part of the paint having a heat shielding effect for the waterproofing coating material for polyurea according to the present invention do.

The coloring pigment has a coloring finishing effect after the coating is applied, in the case of white to increase the heat shielding effect by the effect of the reflection of light, the limit of the amount of use must be at least 5% by weight to ensure the hiding power, As it increases, hiding power increases. Therefore, it is desirable to be within the range of 5 to 10% by weight for the hiding power to show the optimum working performance.

The UV stabilizer prevents discoloration, surface cracking, and deterioration of physical properties that may be generated by ultraviolet rays in the sun after application of the paint, and the liquid stabilizer shows the most excellent effect, and when added to less than 0.2% by weight from ultraviolet rays It is not possible to prevent the damage, and when added at 2% by weight or more, since the effect of preventing further ultraviolet rays can not be obtained as well as the cause of cost increase, it is preferable to be within the range of 0.2 to 2% by weight.

The dispersant is an additive for facilitating the dispersion of pigments, resins and hollow glass bubbles. In the present invention, a solid 81% dispersant of an alkylolammonium salt of a block copolymer having an acidic group is used. Due to the lowering of the acidity, the physical properties are lowered, and when added in an amount of 2% by weight or more, the dispersing effect is high, but the overall physical properties are lowered.

The antifoaming agent is an additive for removing bubbles generated during the preparation of the paint, and a polyglycol mixture of polysiloxane is used, and when added to less than 0.2% by weight, it is difficult to remove sufficient bubbles, thereby lowering the physical properties of the paint, and more than 2% by weight. When added to the bubble removal effect is high, but in order to achieve the harmony of the overall physical properties is preferably in the range of 0.2 to 2% by weight.

The acrylic rubber is to improve the problems of cracks and chemical resistance that may occur during the manufacture of the paint, and when applied at 5 wt% or less, problems of bending performance are not improved, and the chemical resistance and cracks increase as the amount of use increases. And to improve bending performance. However, as the amount of use increases, the tensile force is lowered, so it is preferable to be in the range of 5 to 20.5%.

The paraffin wax is added to eliminate the disturbance of oxygen in the air, the amount of use is preferably in the range of 1 to 5% by weight.

When the hollow glass bubble is added in less than 13% by weight, there is a problem in degrading thixotropy and product strength, and when added in an amount of 21% by weight or more, workability is reduced due to excessive viscosity increase, and the coating film is completely dried. Since there is a problem of cracking, it is preferable to be in the range of 13 to 21 wt%.

Next, as shown in Table 3, by varying the weight ratio of the components of the composition in the embodiment of the present invention, it will be described by Examples 1 to 4.

Embodiment of the present invention made as described above when explaining the difference between the heat shielding effect and physical properties according to the content of the components of the raw materials to be mixed as follows.

Example 1

After homogenizing 595g of polymethyl methacryl resin, 59g of pigment, 6g of dispersing agent, 6g of antifoaming agent, 6g of UV stabilizer, acrylic rubber 119g, paraffin wax 30g, 179g of hollow glass bubbles, (width) 100mm x (length) 300mm x ( Thickness) The coating was applied to a 2 mm iron sheet so as to have a thickness of 50 to 100 µm.

[Example 2]

Using polymethyl methacrylate resin 555g, pigment 59g, dispersant 6g, antifoam 6g, UV stabilizer 6g, acrylic rubber 193g, paraffin wax 25g, hollow glass bubble 150g (width) 100mm × (length) 300mm × (thickness) The coating was applied to a 2 mm iron sheet so as to have a thickness of 50 to 100 µm at the time of drying.

Example 3

Polymethyl methacrylate resin 574g, pigment 57g, dispersant 6g, antifoaming agent 6g, UV stabilizer 6g, acrylic rubber 119g, paraffin wax 30g, hollow glass bubble 202g (width) 100mm × (length) 300mm × (thickness) The coating was applied to a 2 mm iron sheet so as to have a thickness of 50 to 100 µm at the time of drying.

Example 4

Using polymethyl methacrylate resin 624g, pigment 63g, dispersant 6g, antifoam 6g, UV stabilizer 6g, acrylic rubber 110g, paraffin wax 25g, hollow glass bubble 160g (width) 100mm × (length) 300mm × (thickness) The coating was applied to a 2 mm iron sheet so as to have a thickness of 50 to 100 µm at the time of drying.

In the case of Example 1, due to the proper mixing of the appropriate polymethyl methacryl resin, acrylic rubber and hollow glass bubble, the workability and surface appearance after the dry coating and the effect of heat shielding were excellent.

In the case of Example 2, the acrylic rubber content is high, the work performance is reduced due to the increase in the volume solid content, and the coating film tensile strength is decreased during drying. As the acrylic rubber content was increased, the viscosity of the raw material was increased and the elongation was increased.

In the case of Example 3, both workability and appearance are satisfactory, but the amount of products scattered due to the high content of the hollow glass bubble during spraying was large, and the adhesion of the hollow glass bubble with the polymethylmethacrylic resin was insufficient after drying. This falling phenomenon occurred.

In the case of Example 4, the workability was poor, and the appearance was not good. Due to the high resin content, an excessively large amount is sprayed upon spraying, which causes the external coating to dry first, resulting in poor appearance, and the hollow glass bubble content is relatively low, resulting in deterioration of the brushing performance of the thermal barrier paint.

Table 4 shows the results of Examples 1 to 4.

In order to cure the main parts of Examples 1 to 4 40 to 50% by weight of benzoyl peroxide and 50 to 60% by weight of dioctylphthallay according to the weight ratio, The cured portion was added by 3 parts by weight, dried after stirring, and cured and dried. The composition of Example 1 was best coated with a dry coating thickness of 50 μm, dried at room temperature, and then physical properties were measured.

Measurement of the physical properties of the paint is as follows.

Drying time-Drying time test was confirmed after the natural coating (25 ℃) after coating the glass plate using an applicator (applicator) with a wet coating thickness of 50㎛ according to KSM 5000.

Water resistance-Wet coating film thickness is 50㎛ After coating the glass plate using an applicator, it is naturally dried for 1 week at room temperature and immersed in distilled water for 168 hours, and then visually judges the abnormality of the coating film.

Solvent performance-Wet film thickness is 50㎛. After coating on glass plate using applicator, it is naturally dried for 1 week at room temperature, and it is immersed in xylene for 168 hours.

Impact resistance performance-Wet coating thickness is 50㎛, after coating on steel plate using applicator, it dries for 1 week at room temperature, and it is 1/2 inch with load of 0.5kg by DUPONT TYPE drop impact tester. A drop test is performed at a height of 30 cm with a spherical surface weight to visually determine the peeling of the coating film.

Accelerated weathering performance-Test specimens are tested according to ASTM D 154G cycle 1. After 200 hours of exposure to weathering equipment, the cracks and checks according to ASTM D660 and ASTM D661 standards are judged for the appearance and appearance of the coating. Observe for abnormalities.

According to the measurement results of the physical properties of the coating, the specimens coated with the composition of Example 1 were excellent in the physical properties of the coating material and the working performance of the coating material, and in particular, it can be seen that the weathering performance of the polyurea waterproofing coating material was greatly improved.

The following describes the test results for the thermal insulation effect according to an embodiment of the present invention.

The following structures were constructed for the experiment. Polyurea coating material satisfying the above Tables 1 and 2 in a corrugated cardboard box (300 × 300 × 300) with five sides blocked is a high temperature and high pressure Reaction Injection Machine (Gasma 3500) ) Is applied to the entire horizontal and vertical planes so that the film thickness is about 2 mm. The applied structure shall be free of five sided sheet-to-sheet joints.

The fast curing type heat shielding coating material using the polymethyl methacrylate resin of Examples 1 to 4 is coated on the structure of the polyurea coating material to be 50-100 μm with a brush painting. The color of the paint is light gray with excellent heat shielding effect.

Through the above steps, the finished structure is aged for 7 days at room temperature, and then irradiated with a heat source (infrared irradiator, Philips 250W, E27-230V, infrared wavelength 0.8 ~ 1.4㎛) in a sealed space, the difference between the internal temperature and the external temperature Was measured after 30 minutes.

The internal temperature was measured when the structure was opened with a glass rod fixed inside the specimen, and the surface temperature of the upper layer was measured by a non-contact thermometer (SA-8 SK-8700). However, the structural specimens that do not meet the basic requirements of the coating material were measured, but the use of the coating material is not preferable.

The temperature difference between the inside and the outside was measured to compare and examine the relative heat shielding effect. As shown in Table 5, Example 1 has the largest inside and outside temperature difference, and the surface form and work performance were also excellent.

Although the heat shielding effect of Example 1 to Example 4 showed the comparative difference, it turns out that the heat shielding effect is superior to the conventional general coating material which does not apply this invention. As a result of comparatively examining the relative heat shielding effect, it can be seen that Example 1 is the most preferred embodiment.

Referring to the construction method of a fast curing heat shield using a polymethyl methacryl resin for the polyurea waterproof coating material of the present invention.

For the construction of a fast curing type heat shield using polymethyl methacrylate resin, a polyurea waterproofing material satisfying the properties of Tables 1 and 2 was used by using a high temperature and high pressure impact mixing spray equipment (Gasma 3500), which is a dedicated equipment, It must be able to be sprayed, and the finished surface sprayed at high temperature and high pressure is constructed in the following two steps.

The method of finishing polyurea expressed on a structure for waterproofing may be sprayed onto the surface of a protrusion or a smooth sheet, and the process of finishing the protrusion is a feature that can be applied to the coating material of a fast curing type polyurea. After spraying the spray particles scattered by the coating on a smooth surface and expressed in the shape of a protrusion in a few seconds, and after the method of construction of the polyurea waterproofing material, a polymethylmethacrylic resin on the upper surface of the polyurea waterproofing material It consists of two stages of finishing hardened heat shield with oily roll or airless spray equipment.

This method of painting can be applied to the vertical or horizontal of the structure requiring waterproofing, and the wall thickness of the structure intended for waterproofing because the thickness of the waterproofing material can be freely constructed as needed as it is characterized by very fast curing time. And a construction method that can be freely applied to the upper layer and the like.

In addition, due to the nature of the non-permeable waterproofing material may cause a sliding accident in the rain can be finished with a heat shield having a non-slip function for pedestrian walking safety. The finish of the thermal insulation material having an anti-slip function is uniformly sprayed on the upper surface of the polyurea waterproofing material of geumgangsa or quartz aggregate having anti-slip function, No. 5 to 6 yarn, and then fast curing type heat shielding material using polymethylmethacryl resin. It is a process of finishing with oil-based rolls, and it can satisfy the fast curing type waterproof coating material with anti-slip function. This satisfies the non-slip test BPT (British Pendulm Tester): BPN 40 or higher according to ASTM E303.

As described above, the present invention is a polymer material due to the destruction of the polyurea waterproof layer by ultraviolet rays, the cracking of the waterproof material, and the degradation of the polyurea waterproof layer in order to solve discoloration, lifting of the coating film and peeling of the coating film, which are problems of the polyurea waterproof coating material. By improving the strain and molecular chain breakage of the compound deterioration of the complex deterioration and technical enhancement, and in particular to the factors for the ultraviolet rays and the temperature rise of the complex deterioration.

In addition, by using polymethyl methacrylate resin, it has excellent effect of fast curing due to initiation reaction due to radical formation even in low temperature working environment during winter, and excellent thermal insulation effect due to thermal stability and low thermal conductivity using hollow glass bubble. have.

Although the present invention has been described with reference to the drawings, the terms or words used in the specification and claims are not to be construed as being limited to the conventional or dictionary meanings, and meanings consistent with the technical spirit of the present invention. It must be interpreted as a concept. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

Claims (6)

In the coating material composition which consists of a main part and a hardening | curing agent part,
The main part is 50 to 65% by weight of polymethylmethacrylic resin, 5 to 10% by weight of pigmented pigment, 0.2 to 2% by weight of dispersant, 0.2 to 2% by weight of antifoam, 0.2 to 2% by weight of UV stabilizer, based on 100% by weight of the main part, 5 ~ 20.5% by weight of acrylic rubber, 1 ~ 5% by weight of paraffin wax, and 13 ~ 21% by weight of hollow glass bubble,
Fastening type car using polymethylmethacrylic resin for polyurea waterproof coating material, characterized in that the hardener portion is composed of 40 to 50% by weight of benzoyl peroxide, 50 to 60% by weight of dioctylphthalate based on 100% by weight of the hardener portion. Reheating composition.
The method according to claim 1,
Fast curing type heat shield composition using a polymethyl methacrylate resin for the polyurea waterproof coating material, characterized in that the curing portion is added by 4 to 5 parts by weight based on 100 parts by weight of the main portion.
The method according to claim 1,
The polymethyl methacryl resin is composed of 30 to 40% by weight of methyl methacrylate, 20 to 30% by weight of butyl acrylate, and 30 to 50% by weight of polymethyl methacryl with respect to 100% by weight of polymethyl methacryl resin. Fast curing type heat shield composition using a polymethyl methacryl resin for a polyurea waterproof coating material characterized in that.
The method according to any one of claims 1 to 3,
The viscosity of the polymethyl methacryl resin is a fast curing type heat shield using a polymethyl methacryl resin for a waterproof coating material for polyurea, characterized in that 300 ~ 400cP.
While gradually raising the temperature of the reactor, 30-40% by weight of methyl methacrylate and 20-30% by weight of butyl acrylate were added to 100% by weight of polymethylmethacrylic resin in a reactor, and the temperature was maintained at 70 ° C. Polymethyl methacryl resin manufacturing step of completing by adding 30 ~ 50% by weight of methacryl slowly for 3 hours at a speed of 200 rpm and cooling to a temperature of 30 ℃,
50 to 65% by weight of the polymethylmethacrylic resin, 5 to 10% by weight of pigmented pigment, 0.2 to 2% by weight of dispersant, 0.2 to 2% by weight of antifoam, 0.2 to 2% by weight of UV stabilizer, and acrylic Step of manufacturing the main portion of the fast curing type heat shield composition to homogeneously homogenize 30 to 40 minutes in a rubber 5 ~ 20.5% by weight, paraffin wax 1 ~ 5% by weight, hollow glass bubble 13 ~ 21% by weight,
For curing polyurea, characterized in that it comprises a step of producing a hardened portion of the fast curing type heat shield material composition containing 40 to 50% by weight of benzoyl peroxide, 50 to 60% by weight of dioctylphthalate based on 100% by weight of the hardened portion Method for producing a fast curing heat shield composition using a polymethyl methacryl resin for the coating material.
Pretreatment step to remove debris,
After coating step to improve the adhesion of the pretreated structure and the polyurea after the pretreatment step,
Polyurea waterproofing construction step of spraying the polyurea waterproofing material on the upper surface of the structure after the bottom coating step using the impact mixing spray equipment,
The construction of the fast-curing heat shield composition for coating the fast curing heat shield composition of any one of claims 1 to 3 using any one of an oil roll and airless spray equipment on the upper surface of the polyurea waterproofing material construction Method for constructing a fast curing heat shield composition using a polymethyl methacryl resin for a polyurea waterproof coating material characterized in that.